Statistical Approach to select the Best Suitable Solar Model for Global Radiation: Case Study of Karachi, Pakistan

Utilization of solar energy for the fulfillment daily routine tasks has gained a lot interest in recent past. The complete utilization can be accomplished only if proper data is available particular site. measurement expensive and time consuming. Different empirical correlations are estimation radiations on In this research, monthly average radiation horizontal surface compared with measured as typical metrological year, TMY2, estimated from different models Karachi. studied Ahmad models, Raja Models, Hargreaves Model Black model. NASA values. comparison was done by using statistical techniques like MAPE, MBE, RMSE t-stats. results revealed that model best to estimate global Karachi minimum value t-stats while 3 most inappropriate highest RMSE, MBE t-stat. Overall, already established used errors.